[SANOG] Cisco Security Advisory: Cisco IOS and IOS XE and Cisco Unified Communications Manager Software Session Initiation Protocol Memory Leak Vulnerability

Wed Mar 23 18:33:49 UTC 2016

A vulnerability in the Session Initiation Protocol (SIP) gateway implementation in Cisco IOS, IOS XE, and Cisco Unified Communications Manager Software could allow an unauthenticated, remote attacker to cause a memory leak and eventual reload of an affected device.

The vulnerability is due to improper processing of malformed SIP messages. An attacker could exploit this vulnerability by sending malformed SIP messages to be processed by an affected device. An exploit could allow the attacker to cause a memory leak and eventual reload of the affected device.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability other than disabling SIP on the vulnerable device.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-sip

This advisory is part of the March 23, 2016, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes six Cisco Security Advisories that describe six vulnerabilities. All the vulnerabilities have a Security Impact Rating of "High." For a complete list of advisories and links to them, see Cisco Event Response:
http://www.cisco.com/c/en/us/about/security-center/event-response/cisco-erp-march-2016.html